That is my recommendation also. Epoxy by nature is stronger than the wood
itself, but is prone to failure in the sun. Epoxy first and then follow it
up with marine varnish to act as sunblock.
----- Original Message -----
From: "Don Hanson" <dhanson@GORGE.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, August 08, 2008 9:08 AM
Subject: Finishes that can stand up to weather for plywood..Was Van trailer
or some such.

>  One very durable combo finish for wood that will be taking a weather
> beating is to do a few coats of epoxy first and then use a good quality
> marine varnish..with a UV protector if it will be in the sun.  You can buy
> a
> two part epoxy online.
>
>  Depending on the wood species, you should thin out the first coat of
> epoxy
> to penetrate well.  Sand between coats and put about 2-3 coats of varnish
> on
> the top.  You can 'refresh' the varnish topcoat as needed.  We used this
> technique at a boatyard where I worked and it amazed our customers.  I
> have
> some oak counter tops in my kitchen that are 12 years old now and still
> look
> almost brand new.
>
>  Pay attention to the epoxy.  It's pretty gnarly stuff..Do keep it out of
> your insides..
>
>  Don Hanson